BROADBAND DIGITAL IN-PHASE AND QUADRATURE SIGNAL TRANSMISSION AND CONTROL METHOD CAPABLE OF ESTABLISHING BASE STATION FACILITIES AT AFFORDABLE PRICES

摘要

PURPOSE: A broadband digital in-phase and quadrature(I/Q) signal transmission and control method is provided to construct an RRH(Remote Radio Head) base station with a low cost using a gigabit Ethernet.;CONSTITUTION: A roundtrip delay between a master unit and each remote unit is measured(S610). A longest delay between the master unit and each remote unit is determined as longest delay time(S620). A longest delay time value and a delay time value of a corresponding remote unit is stored in each remote unit(S630). A GPS(Global Positioning System) 1pps signal is pre-inputted for the longest delay time(S640). Downlink data is transmitted to the remote unit from the master unit(S650). The remote unit transmits I/Q(In-phase and Quadrature) data through an RF(Radio Frequency) transmission part or an antenna(S660). The master unit receives uplink data from the remote unit(S670). The master unit buffers the uplink data transmitted from the remote unit(S680). The accumulated I/Q data is transmitted to a base-band processing part(S690).;COPYRIGHT KIPO 2012